Dr. Ramirez just started an experiment. He will collect data data for 7 days. How many hours is this?

the answer is 168.

Step-by-step explanation:

7 times the number of hours in a day (24) equals 168.

Edit: i edited the answer to avoid any confusion my original answer was wrong.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0